Update:
So the situation with my brother remains the same. He still hasn't decided if he's coming to Mexico. He still is "working on" the application for the dream job back home. (working on? it takes max an hour to put an application together).
However my own life has turned around. Since hearing from you guys about how my mom is enabling, and how I in turn am enabling her and him, I read some books and did some thinking. I get it! I get boundaries now! Here's an anecdote to illustrate:
About a month ago, pre-codependent study, one of my son's teachers asked me for a $1500 peso loan. She was really desperate, she didn't want her mom or any of the other teachers to find out, she blah blah blah. She promised to pay it back by July 18th, because she would be receiving her share of a 'cundina' (a cundina is when a group of people get together and agree to pay a certain amount to each other each week. So week #1, everyone pays person 1 $200 pesos. Then week #2 everyone pays their 200 pesos to person 2. And so on. It's a great way for people who suck at money to "save" money so they can afford some big purchase they otherwise wouldn't be able to. Every week you pay $200 pesos, but then one of those weeks you get $200 pesos from everyone).
She also mentioned an upcoming summer course starting July 20th she was going to be running with two other teachers from school. I knew I'd probably need to do the summer course, as childcare during no-school months. So I figured if she doesn't pay me back, I'd just do the summer course and not pay for it.
So yeah, July 18th rolls around and she calls me with a crazy emergency "kid! dentist! cavities! ahhh!" She promise promise promised to pay me back in a week. (By the way, between when I gave her the loan and July 20th, she shows up with new braces and a super fancy bejeweled manicure. Not cool).
Summer course has started and of course they want their tuition upfront. I tell the teacher in charge of collecting that I'll pay the full tuition in one week. I don't give any explanation. She was ok with it.
{Now I begin and finish Codependent No More, and hear from all of you guys about "enabling" and what it is, and why it's not a good thing.}
Ok, so the day before her NEW due date to pay me back, she calls me with yet another excuse. But this time she really really really promises for sure definitely to pay me back in one more week. She begs me to please not tell the other teachers because "they'd be really upset with her". Um, and me? I tell her I'll think about it for one day. She calls me back and begs some more, and since I'm just starting to use this magic word "no", I kind of don't say yes or no, just a very weak "ok".
But that evening I call up the teacher in charge of collecting and tell her the whole story. I tell her to please take my payment out of mooch-teacher's share of the course. She was ok with that. But also told me that Egads! She had just today loaned mooch-teacher $1000 pesos. WTF?
So yay me! I learned that mooch-teacher's problem is NOT my problem. And my huge breakthrough mantra: "Just because I CAN help someone, doesn't mean I HAVE to".
Repeat after me, enablers and codependents: "Just because I CAN help someone, doesn't mean I HAVE to".